If you are given a gas that has a volume of 4.9L and a pressure of 6.42atm and raised the pressure to 19.98atm, what is the new volume?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Volume is a measurement of how fast particles of a substance are moving

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.